Max Bearing Load for a Target L10 Life

P_max = C x (10^6 / L10_rev)^(1/p) with L10_rev = target_hr x 60 x rpm (p = 3 ball, 10/3 roller). A ball bearing rated C = 5,000 lbf at 1,750 rpm can carry 1,000 lbf for a 1,190 hr L10; because life scales as the cube of the load ratio, doubling the required hours only cuts the allowable load by about 20%. Answers 'how hard can I load this bearing' instead of checking one load. A planning estimate; the mounting, lubrication, and application govern.

p = 3 (ball) or 10/3 (roller); L10_rev = target_hr x 60 x rpm; P_max = C x (10^6 / L10_rev)^(1/p); the inverse of L10 = (C/P)^p x 10^6.

The ISO 281 / ABMA 9 & 11 basic rating life (L10) solved for the maximum equivalent load, by name; the mounting, lubrication, and application govern.

The L10 rating-life relation is a published ISO 281 / ABMA result; the dynamic load rating C comes from the bearing catalog and the target life from the application.

Estimate. AHJ and licensed professional govern.

Field names used by the API: dynamic_rating_lbf, target_life_hr, speed_rpm, bearing_type, max_equivalent_load_lbf

• Cube law inverse P_max scales as (10^6/L10_rev)^(1/p), p = 3 ball / 10/3 roller; the load limit is weakly sensitive to the target lifeISO 281
• Basic L10 assumes clean, well-lubricated operation; contamination needs the modified aISO lifeISO 281
• 10% definition L10 is the life at which 10% have failed, not the average (L50 is ~5x)ABMA 9 & 11